Your tides for that time frame- low tides will be between 6:30 and 7am, high tides between 7:30 and 8pm on the 21st. Tides for subsequent days fall about 20 min later each day until about the 25th (new moon). I have my best luck fishing inshore while water is moving- usually a couple of hours before each tide. An easy spot to fish in Orange Beach as far as accessibility is under the Perdido Pass bridge- you fish pretty much where you park so there is minimal hauling of gear! Redfish should be running through the pass, and with live shrimp or fiddler crabs you should pick up some sheepshead too.
Here are the AL regulations:
http://www.outdooralabama.com/fishin...eel_limits.pdf